Imagine what would have happened if the US was a late comer to modern industrialization. Let's say it kept most of it's population on the farm, like Jefferson wanted. Then, say - a few decades ago, technology increased on the farm and all the people fled into today's cities.
In the past, when the world was not such a global capitalist system, they would have worked in Ford's automobile plants, domestic steel, railroad production, domestic manufacturing of all kinds.
But of course, all that is done in China and elsewhere as global capital seeks the poorest slave in the poorest country.
In short, our modern industrial revolution would never have happened.